Adrian Peterson is not a normal running back. So it's only fitting that the Minnesota Vikings held an abnormal media session for the team's best player on Wednesday.

Peterson, now more than four months removed from ACL and MCL surgery, worked out for Minnesota media on Wednesday. He was seen running without a brace on his knee. (Behold: Footage, courtesy of Tom Pelissero of ESPN1500.com.)

The four-time Pro Bowl selection said he would be "very surprised" if he doesn't play in Week 1. Vikings head athletic trainer Eric Sugarman wasn't making any promises.

"We will be realistic with his expectation. ... Iâm not going to say with certainty that heâs going to play game one," Sugarman said.

Peterson estimated that he's only "50 percent" back to where he wants to be in terms of explosiveness and cutting ability. But he pointed out that he's been ahead of schedule with his rehabilitation since Day One.

"That first game against Jacksonville, I plan on being back and it will be disappointing if Iâm not," Peterson said.

The Vikings have to be careful. Peterson has a chance to be one of the all-time greats and this isn't a season during which Minnesota will be contending for a championship. It's more important to preserve his long-term health for the seasons the Vikings are relevant again.